linux-kernel - Re: [PATCH] drm/exynos: Remove dev_err() on platform_get

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Date:   Mon, 18 May 2020 11:03:12 -0700
From:   Joe Perches <joe@...ches.com>
To:     Tamseel Shams <m.shams@...sung.com>, inki.dae@...sung.com,
        jy0922.shim@...sung.com, sw0312.kim@...sung.com,
        kyungmin.park@...sung.com, airlied@...ux.ie, daniel@...ll.ch
Cc:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        shaik.ameer@...sung.com, krzk@...nel.org, alim.akhtar@...sung.com
Subject: Re: [PATCH] drm/exynos: Remove dev_err() on platform_get_irq()
 failure

On Mon, 2020-05-18 at 22:57 +0530, Tamseel Shams wrote:
> platform_get_irq() will call dev_err() itself on failure,
> so there is no need for the driver to also do this.
> This is detected by coccinelle.

trivia:

> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
[]
> @@ -1810,7 +1810,6 @@ static int exynos_dsi_probe(struct platform_device *pdev)
>  
>  	dsi->irq = platform_get_irq(pdev, 0);
>  	if (dsi->irq < 0) {
> -		dev_err(dev, "failed to request dsi irq resource\n");
>  		return dsi->irq;
>  	}

You could also remove the now atypical braces

	if (dsi->irq < 0)
		return dsi->irq;

> diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.c b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
[]
> @@ -294,7 +294,6 @@ static int rotator_probe(struct platform_device *pdev)
>  
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq < 0) {
> -		dev_err(dev, "failed to get irq\n");
>  		return irq;
>  	}

etc...